Flight 175 crashed into the southern facade of Tower 2 of the World Trade Center (south tower) at 9:02:59, traveling at approximately 545 mph and
impacting between floors 77 and 85 with approximately 10,000 gallons of jet fuel.[13][20]

When you look at it the plane it was a 154 ft crimple zone like you have on the front of your car and the tail of the plane should had been going much
slower by the time it hit the building and all the conetic energy released would have been dispated over a few seconds so it's not like to anyone can
say it was a 100 ton ball of steel hitting the builing at 300-500mph and this is why i say next to no damage would had been done to the main structral
core of the building.

Planes are just scaled up versons of tin foil planes made by kids except for the engines and even they are not that heavey.

Did it ever occur to you that the image you're editing and manipulating as if it were your own personal plaything is an image of the exact moment of
time that some seventy of your fellow Americans died? Instead of every pixel being some abstract mathematical formula translating into feet, I see
every pixel being the size of someone's mother, or brother, or wife, all clinging to each other in tears knowing they had less than a second left to
live.

I watched a documentary some time ago that discussed how a commercial boeing 747 cannot travel anywhere near 500 miles an hour at such a low altitude.
It would disintegrate in matter of seconds, and pilot would have absolutely no control of the aircraft. The person in the video called up a whole
bunch of professors and scientists and they all confirmed this.

More than likely a doc outlining the conspiracy so all these scientists etc would have been spoon-fed questions and don't forget editing either so i
would take these interviews with a pinch of salt.

It maybe true the plane is not capable or designed to fly at these speeds at such altitude over LONG PERIODS but a one off, short, well placed dive
towards the tower is feasible without the plane breaking in mid air.

The designers know that every plane will come under such stresses on occasion so these planes are designed to cope.

The problem is that the planes did not "dive," they were on about the same level for a long distance... And in the doc the guy tried not to spoon
feed questions, he informed the scientists/professors that he is talking about the 9/11 attacks.

Originally posted by THE_PROFESSIONAL
Between frames 92 and 98 there is:
92 and 98 there is a pixel difference of 27.48 pixels = 103 feet
92 and 98 there is a time difference of 6 frames = 0.200 seconds

The NTSB did the same speed analysis with the same video. (albeit, not from youtube).

It was posted on the bottom of page 18 in the NASA thread I started.

Originally posted by cams
Just for the record, the National Transportation Safety Board (NTSB) also conducted video analysis and provided varying groundspeeds aside from the
510 Knot rada data.

NTSB Video Data Impact Speed Study UA 175

Summary
Using distances taken directly from the video screen, flight 175's groundspeed was calculated to be between 473 and 477 Knots just prior to the
collision with the building. Using distances taken from video screen prints, groundspeed at impact of 504 Knots and 507 Knots were calculated. This
compares to an impact speed of 510 Knots calculated from radar data in the Radar Data Impact Speed Study (AA11 & UA 175)

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